It's true that no Western "sovietologist" had predicted the sudden fall of the Eastern Block, but that doesn't mean that the West and the countries that were under Soviet influence weren't enemies. Source: me, a guy that grew up in an Eastern European country and who was imbued with my country's propaganda during my childhood.
And to make it even more OT: the "war" between West and East was won by the West the moment when people in the East started almost revering physical objects coming from the West, such as blue jeans. I remember that growing up in the '80s my mother's only jeans dress had an almost mythical status, it was THE one piece of clothing from our family's wardrobe that had that extra thing. I remembered of that feeling this past weekend while watching a Russian movie describing the '80s as lived on the Eastern side of the Wall (the movie is called "Leto" [1], I highly recommend it), during which movie one of the female characters highly wishes to purchase a pair of jeans for herself, if only she would have had the money.
It is my intuition that the Western sovietologists from back in the day didn't have access to this type of information on the real feelings of the people living in Eastern Europe and in the former USSR, they were looking mostly at translated articles from Pravda and at satellite photos of rocket-launch sites in order to predict the health of the system. Turns out they were looking at the wrong stuff.
[1] https://www.imdb.com/title/tt7342838/